ipatests: test removing last KRA when it is not running
Use the new role-based mechanism, one that doesn't rely
on direct communication to the server, to determine whether
the server being removed by `ipa server-del` contains the
last KRA server.
https://pagure.io/freeipa/issue/8397
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Francois Cami <fcami@redhat.com>